baber/WOPTO huggingface dataset:
Patent GB-1252949-A (GB)
IPC: F16H27/04
Filed: 1969-07-24
Abstract: 1,252,949. Intermittent gearing; controlling clutches. AMERICAN BANK NOTE CO. 24 July, 1969 [29 July, 1968], No. 37208/69. Headings F2K, F2L, F2Q and F2U. An intermittent drive mechanism in which the relative proportions of rest and motion per cycle are adjustable comprises two rotary indexing devices 10, 11 driven simultaneously by a common drive, the phase relationship between the two devices being adjustable, and shift means operated by the drive to connect an output shaft 12 (Fig. 1) or 78 (Fig. 8) in turn to the outputs 17, 28 of the two indexing devices, the shifts occurring when the angular velocities of said two outputs 17, 28 are equal. Each indexing device comprises a cam 14, 22 and a rotatable follower 16, 27 having rollers 18, 26 thereon. In Fig. 1, the cams are mounted on parallel shafts 15, 24 which are geared together by gears 30, 31. The gear 31 is angularly adjustable relative to the shaft 24 by means of bolts 32 passing through arcuate slots in a disc 34 keyed to the shaft. Alternatively (Fig. 9) the gear 31 rotatably supports a worm 83 which meshes a worm wheel 84 keyed to the shaft 24, the worm being rotated by a handle 86 for said angular adjustment. In Fig. 1, the followers 16, 27 are mounted on coaxial shafts 17, 28 between which is a short coaxial shaft 42 on which is slidable a gear 44 meshing a gear 56 secured to the output shaft 12. The gear 44 is clutchable to flanges 37, 38 on the shafts 17, 28 by a pin 48 engageable in bores 40 of the flanges. Alternatively (Fig. 7, not shown) friction clutches may be used. The gear 44 is moved axially by cams 50, 51 rigid with the gears 30, 31, via followers 53, 54, a rod 49, and a fork 47. In Fig. 8, the cams 14, 22 are mounted on a single input shaft 70, cam 22 being angularly adjustable relative thereto. A gear 80 on the output shaft 78 is axially slidable to mesh one or other of gears 75, 76 on the cam follower shafts 17, 28 respectively. In each indexing cycle, the output shaft is connected firstly to the device 10, then to the device 11. Each cam 14, 22 has at least one dwell period and at least one period of uniform output rotation, the uniform rotation being at the same speed for both cams. In the example of Fig. 10, device 10 drives the output shaft from time t 0  to t 1 , the connection then being shifted to device 11 until time t 3 , when both cam followers are at rest. The shaded portions represent the output angular velocity, which is dependent on the cam characteristics and their phase relationship, as well as upon the shift points.
Patent GB-1257509-A (GB)
IPC: G01S7/56
Filed: 1969-07-09
Abstract: 1,257,509. Echo-sounding. FRIED. KRUPP G.m.b.H. 9 July, 1969 [10 July, 1968], No. 34554/69. Heading H4D. [Also in Division G1] Recording apparatus, in particular for echo sounding, comprises a scale carrier 1 of glass or other transparent material having little tendency to expand under the influence of temperature or moisture, a light source arranged to direct light longitudinally through the carrier 1 to illuminate it internally a scale 8 on a side surface of the carrier 1 and means 2 for producing by reflection a virtual image 20 of the scale on a recording strip 3 in the region of data being recorded thereon.  The reflecting means 2 is a semi-transparent dichroic mirror. The carrier 1 may carry a plurality of scales 8, 9, 10, 11 for different measuring ranges which may be selected and rotated into position for reflection by the mirror through electromagnetic stepping mechanism 17 co-operating with annular magnets 13.
Patent GB-1258275-A (GB)
IPC: C01B31/00
Filed: 1969-01-13
Abstract: 1,258,275. Coating with carbon. GULF OIL CORP. Jan. 31, 1969 [Jan. 18 1968], No. 1907/69. Heading C7F. [Also in Division C1] Articles, e.g. uranium dicarbide or thoriumuranium dicarbide nuclear fuel particles are coated with low and high density pyrolytic carbon layers by decomposition of hydrocarbons. The high density carbon has a B.A.F. of not more than 1À2, and a density above 50% of maximum theoretical. The H.D. carbon is deposited using propane or methane or mixture thereof at a temperature below 1400C. (1250 to 1400). The L.D. carbon is deposited below 1400C. using acetylene or at high temperatures 1800 to 2200C. using propane or methane or a mixture thereof. In a specific example, thorium-uranium dicarbide spheroids diameter 150 to 250 microns in a graphite reaction tube heated to 1300C. are subjected to an upward flow of helium to form a fluidized bed. Acetylene is then substituted for the helium at a flow rate of 10, 000 c.c. per minute to form a L.D. carbon coating. The acetylene is then replaced by a mixture of propane and helium at a total flow rate of 10,000 c.c. per minute to deposit the H.D. layer of carbon. Additional coatings of the carbides of silicon, zirconium, and niobium may be applied with the carbon.
Patent GB-1266722-A (GB)
IPC: G21C9/012
Filed: 1969-04-23
Abstract: 1,266,722. Reactors. LINDE A.G. 23 April, 1969 [30 April, 1968], No. 20640/69. Heading G6C. Contaminated steam leaking from a nuclear reactor is condensed on ice tubes. The baskets 4 containing ice tubes are supported in the chamber 5, surrounding the nuclear reactor. Steam leaking from the reactor primary circuit enters through the flap valves 7 and air is ejected through the valves 8.
Patent GB-1266821-A (GB)
IPC: B01J13/20
Filed: 1970-04-15
Abstract: 1,266,821. Treating polypeptide films. NATIONAL CASH REGISTER CO. 15 April, 1970 [5 May, 1969], No. 17883/70. Heading B5B. Polypeptide-containing films, e.g. the walls of capsules containing mineral oil, are treated to decrease their water solubility by contact for at least 2 days with an aqueous solution of citrate ions, e.g. from sodium citrate. The ion concentration may be at least 0À25 molar at a pH of 4-10. The treated films may be dried for 2-60 days at a R.H. of up to 30%. The film material may be a complex coacervate of gelatine with either gum arabic or a hydrolysed ethylene-maleic anhydride copolymer. In an example, a gelatine-gum arabic complex is precipitated by mixing aqueous solutions of the components, and the complex is cast into a film, which is treated as above.
Patent GB-1296222-A (GB)
IPC: C08G63/676
Filed: 1969-11-18
Abstract: 1296222 Particulate cross-linked unsaturated polyesters and compositions thereof ARMSTRONG CORK CO 18 Nov 1969 [18 Nov 1968] 56364/69 Heading C3P A finely divided cross-linked polyester resin has an average particle diameter of less than 15 Á, the base polyester resin being prepared by the reaction of 1 mol of one or more dihydric alcohols with 0À7 to 1À3 mols of at least one dicarboxylic acid or anhydride at least 2 mol per cent of which is unsaturated, the term " polyester resin " including a polyester per se, a diisocyanate chain extended polyester, mixtures of either of these with up to 70% by weight of a copolymerizable monomer, and mixtures of any of these. The cross-linked particles may be made by mastication of a cured, partially cured or uncured polyester, until the desired particle size is obtained. When the polyester is cured or partially cured, this may have been achieved by use of a peroxide or azide catalyst. If the polyester is uncured or partially cured before mastication, the mastication is said to effect the cure, or the completion thereof. Mastication may be effected for example in a Banbury type mixer with or without further treatment, for example in the nip of the rolls of a rubber mill, from which a sheet of agglomerated particles is obtained, which may be broken down into the fine particles. The polyester may be mixed with fillers and other adjuvants prior to curing. Blends are obtained by mixing the finely divided cross-linked particles with an uncured fluid unsaturated polyester (as defined above) which may be the same as, or different from the cross-linked polyester. In the examples, polyesters are prepared from phthalic anhydride and maleic anhydride or fumaric acid, and various mixtures of diols selected from ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, a polyoxyethylene glycol of M.W. 400, and trimethylolpropane, the polyester in Example 8 being chain extended with toluene diisocyanate. The polyesters are cured alone or with styrene or vinyl toluene, either by initiators (followed by mastication), by mastication alone (between rubber mill rolls), or partially cured and then masticated. Blends are prepared of some of the uncured resins, with some of th cured particulate resins together with adjuvants such as limestone, TiO 2 , carbon, stearic acid, copolymerizable monomers such as styrene, diallyl phthalate and divinyl benzene, and zinc stearate, and are used to obtain mouldings by curing them with the usual agents.
Patent GB-1296701-A (GB)
IPC: G06V30/194
Filed: 1969-06-20
Abstract: 1296701 Pattern recognition NATIONAL RESEARCH DEVELOPMENT CORP 16 Sept 1970 [20 June 1969] 31399/69 Heading G4R In pattern recognition apparatus, a plurality of electric signals, each developed from a different n-tuple examination of the pattern bearing area, each address a store to obtain a zatocoded word which is applied to decoder means having a separate output channel for each of the patterns capable of being recognized, each channel being connected to a respective counter. 300 bits from a raster scan of a character to be recognized are applied to a shift register having 600 stages, and as the bits are shifted through, a sequencer is advanced every 6 shift pulses to enable 50 sets of 14 AND gates in turn, in each of 4 logic units simultaneously, each gate being fed from a particular stage of the shift register directly or via an inverter. The 14 bits produced in each case address a respective 48-bit zatocoded word in a core store in the logic unit, this word being read into a buffer register, a respective set of 10 AND gates enabled by the same output of the sequencer each recognizing a particular pattern of 4 ones in this word. Each such AND gate feeds a respective counter in common with corresponding AND gates corresponding to the other outputs of the sequencer. Finally, the contents of the corresponding counters in the four logic units are added, the largest of the 10 sums identifying the character. Processing as above by the logic units may be preceded by stroke-width standardization and size normalization, or feature extraction (the bits representing the features). Choice of the core store contents in a learing process is described.
Patent GB-1303893-A (GB)
IPC: H03K3/313
Filed: 1970-08-19
Abstract: 1303893 Gunn effect devices STANDARD TELEPHONES & CABLES Ltd 19 Aug 1970 39900/70 Heading H1K [Also in Divisions H3 and H4] A modification to the circuit of the Specification 1,126,663 including a body 10 of semiconductor material exhibiting high field instability effects, a current source 12 producing an electric field between contacts 11 less than the instability threshold value and an input signal circuit 14 which in response to an input signal raises the electric field above the instability threshold value for a time shorter than the instability transit time to cause the current through the body to undergo a single excursion from its steady state value consists in the body 10 having a diamond or zinc blende lattice structure with #, L and # energy states. The material may be a Group III-V type semiconductor such as GaSb or a ternary Group III-V alloy such as In x Ga 1-x Sb or a suitable Group II-VI compound. In a modification (Fig. 2, not shown) the input signal is fed to a third electrode (25) insulated such as by a silica layer (26) from the body adjacent a constricted part (27). Variation of the potential of this electrode (25) controls the depth of an associated depletion layer and the local field. The current source 12 may be pulsed. In the transmitter arrangement shown for a communications link, an input signal 15 modulates the frequency of oscillator 14 to produce a train of output pulses from 13. The circuit acts as a pulse amplifier and a similar arrangement to that shown in Fig. 1 may be used at the receiving end of the link. The received frequency modulated signal is applied to the input of the device 10 in place of that from oscillator 14 so that an amplitude modulated output signal is obtained from a filter fed by the output from the device 10.
Patent GB-1309883-A (GB)
Title: Nuclear reactors
IPC: G21C1/12
Filed: 1971-03-18
Abstract: 1309883 Nuclear reactors UNITED KING- DOM ATOMIC ENERGY AUTHORITY 3 March 1972 [18 March 1971] 7255/71 Heading G6C In a nuclear reactor construction, heat is transferred from the nuclear fuel to heat energy conversion apparatus by use of a finely-divided solid material as a heat transfer medium. In one form, the heat-transfer medium, which also acts as moderator falls from the reactor vessel on to a heat exchanger under the influence of gravity; the flow may be regulated by a valve. In another form, in which the heat exchanger is remote from the vessel, the heattransfer medium is conveyed to above the heat exchanger by conveyer. The heat-transfer medium is returned to above the fuel by conveyer. The heat-transfer medium may be finely-divided graphite, and may be maintained in a free flowing condition by vibrating or pulsating means. Reactivity in the core can be varied by raising and lowering the fuel elements. Emergency shut-down is effected by injecting neutronabsorbing material into containers penetrating the graphite mass. The fuel elements may be sheathed, or may comprise fission-product retaining particles in a matrix which has no sheath. An inert covered gas may be used in the system. Where the construction is to be used for generating electricity, power cylcing of the reactor is reduced by storing hot cooling and moderating material during periods of low heat energy consumption.
Patent GB-1312003-A (GB)
Title: Brake control systems
IPC: B60T8/17
Filed: 1970-04-06
Abstract: 1312003 Anti-skid brake systems J P C HARTLEY and J O PARRY 6 April 1970 35453/72 Divided out of 1312002 Heading F2F In a brake control system for a vehicle having a plurality of wheels with respective brakes that are actuable in response to a brake actuating fluid pressure, the system includes means for developing a command signal, a valve device normally acting to supply to all the brakes a brake actuating pressure corresponding to the command signal, and adaptive control means including means for developing a control signal that varies in accordance with the vehicle deceleration, and a valve device responsive to the control signal for overriding the command signal to limit the value of the brake actuating pressure when the control signal corresponds to a value of vehicle deceleration less than a predetermined value. The system is fully described in the parent Specification.
Patent GB-1312528-A (GB)
Title: Coolant pumps for internal combustion engines
IPC: F04D29/20
Filed: 1970-09-05
Abstract: 1312528 Mounting impellers on shafts CONCENTRIC PUMPS Ltd 3 Sept 1971 [5 Sept 1970] 42650/70 Heading F2U An impeller 22 comprising a plastics moulding with a non-circular recess (e.g. hexagonal) at one end of a smooth bore, is held on a shaft passing through the bore by a metal washer 30 which is an interference fit on the shaft, and is similarly shaped to and located in the recess (e.g.) loosely to prevent rotation between the parts.
Patent GB-1315431-A (GB)
Title: Therapeutic pack or compress
IPC: A61F7/02
Filed: 1971-05-26
Abstract: 1315431 Therapeutic pack CHATTANOOGA PHARMACAL CO 26 May 1971 17311/ 71 Heading A5R [Also in Division F4] A pack for use in applying moist heat to an area of a patient comprises a gel 5 which will expand and absorb water, a flexible and elastic water-impervious material 3 shaped with a plurality of compartments 4, a sheet of flexible water-pervious material (8) (Figs. 4, 6, not shown) which is relatively inelastic compared with the water-impervious material 3, both the materials 3, (8) being impenetrable by the gel and being secured along their edges. When in use, the pack is immersed in boiling or very hot water, whereupon the hot water penetrates the porous material (8) enabling the gel, which may be a bentonite gel, to fully hydrate. Then the compartments 4 of the pack swell considerably owing to the combination of the water-impervious material, which may be e.g. of a synthetic rubber or other plastics material, and the water-pervious material of the pack, the latter material not swelling nearly so much as the former. As a result there is a reasonable amount of contact between the pack and the patient. Another embodiment (Fig. 9 not shown) includes a layer (17) of a heatinsulating, closed-cell foam material such as polyurethane, enclosed within two sheets of water-impervious material in order to provide better heat insulation.
Patent GB-1315957-A (GB)
Title: Expansion plugs
IPC: F16B13/06
Filed: 1969-10-06
Abstract: 1315957 Expansion plugs DOM HOLDINGS 6 Jan 1971 [6 Oct 1969] 49029/69 Heading F2H An expansion plug, for insertion into a wall to provide an anchorage point and preferably formed from zinc-aluminium alloy or iron diecastings, comprises a tubular shell divided longitudinally into two portions 1, 8 held loosely together by a spring clip 10, and two tubular end pieces 11, 22, such that when the end pieces are drawn together the shell portions 1, 8 bear against and pivot on a ledge 14 on endpiece 11 and wedge-shaped protuberances 26, (27) and a tapered portion 25 of end piece 22 splay the inner ends of the portions 1, 8 apart into engagement with the walls of a bore. Pin- and-slot connections 19, 20, 29, 30 hold the end pieces 11, 22 captive with the shell and protuberances 16, (17), 26, (27) prevent relative rotation therebetween. A setting tool is described which has a threaded end (37) for engagement with an internal thread in the bore of end piece 22 while a shoulder (35) of the tool abuts end piece 11 as shown in Fig. 9b, rotation of the tool then drawing the end pieces together. However, if the plug is fitted in a blind hole, the tool may be used as a punch to hammer end piece 11 towards end piece 22 which is held against the end face of the hole.
Patent GB-1316109-A (GB)
Title: Signal demodulator circuit for pal/secam decoders
IPC: H04N9/14
Filed: 1969-09-05
Abstract: 1316109 Colour television RCA CORP 4 Sept 1970 [5 Sept 1969] 44076/69 Heading H4F A colour demodulator 2 for demodulating the red colour difference signal from a PAL or NTSC signal is modified for demodulating the red colour difference signal of a frequencymodulated " SECAM " (Registered Trade Mark) signal by including between the signal input 9 and one of the demodulator terminals 8 a variable phase shifter 11 which alters the frequency modulation of the incoming signal to phase modulation. The phase shifter 11 provides a phase shift of 90 degrees for signals at the centre frequency, the phase shift deviating linearly from 90 degrees for frequencies deviating from the centre frequency, and the resulting signal is demodulated with respect to the input red colour difference signal fed from input 9 to demodulator input 1. For use with PAL or NTSC switches S 1  and S 3  are opened and switches S 2  and S 4  are closed, as shown in Fig. 3, and a similar demodulator is provided for the blue colour difference signals. The demodulator output 6 is fed to a low pass filter (25, Fig. 5, not shown), an amplifier (26) and low level clamping stage (28) before being passed through a final amplifier (33A) to the picture tube. Before the final amplifier (33A) there is included a deemphasis stage (29) for the SECAM signal, this being switched off for PAL/NTSC by a signal which reverse-biases a diode which otherwise connects the de-emphasise stage to earth. Switched diodes may be used in place of the switches S 3 , S 4  shown in Fig. 3, the input SECAM signal may initially be amplitude limited, and the D.C. clamping level is derived from the colour bursts at the beginning of each line, these bursts being alternately at the red and blue centre subcarrier frequencies.
Patent GB-1316574-A (GB)
Title: Aryl heterocyclic ethers
IPC: C07D277/34
Filed: 1969-05-16
Abstract: 1316574 Aryl-heterocyclic ethers and thioethers COALITE & CHEMICAL PRODUCTS Ltd 18 May 1970 [16 May 1969] 25134/69 Heading C2C The invention comprises 4-benzyl-(2<SP>1</SP>-thiazolyloxy)benzene and 1-methoxy-2-(2<SP>1</SP>-thiazolyloxy)benzene and the preparation of compounds KYR<SP>1</SP>, where R is a non-hetero-cyclic aryl group; R<SP>1</SP> is an optionally substituted thiazolyl group (other than a benzothiazolyl group) and Y is -O- or -S-, Y being directly linked to a carbocyclic aryl group of R, by reacting a compound RYM with R<SP>1</SP>X or a compound R<SP>1</SP>YM with RX when M is an alkali metal and X is a replaceable halogen or pseudo-halogen.
Patent GB-1329691-A (GB)
Title: Vehicles
IPC: B62D53/06
Filed: 1969-06-20
Abstract: 1329691 Varying wheel track POOLE INTERNATIONAL Ltd and H G POOLE 17 Sept 1970 [20 June 1969] 25633/69 Heading B7D A vehicle comprises rear wheels 31, 32 carried by separate stub shafts 20, 21 slidably mounted in an axle member 19, and double-acting hydraulic rams 25, 28 connected between the stub shafts and the axle member for moving the wheels 31, 32 toward and away from one another to vary the wheel track. The axle member 19 is connected to the frame 10 of the vehicle by rubber springs 15 and radius arms 17. The stub axles 20, 21 may be cranked forwardly and rearwardly respectively so that the axes of the wheels 31, 32 coincide. Hydraulic or electric motors may be provided for driving the wheels 31, 32. The vehicle may be a rigid or articulated low loader, dumper, concrete mixer or concrete skip. Increasing the wheel track provides improved access to the rear of the vehicle or increases stability when travelling over uneven surfaces.
Patent GB-1331113-A (GB)
Title: Control apparatus for an electron beam welding machine
IPC: B23K15/02
Filed: 1970-11-05
Abstract: 1331113 Welding by fusion DEFENCE SECRETARY OF STATE FOR 5 Nov 1970 52643/70 Heading B3R [Also in Division G1] In an electron beam welding apparatus, a photo-electric device, energized through a variable mark/space ratio pulse generator, is used to control switching on and off of the electron beam at sufficient speed to avoid steplike changes in temperature of the workpiece as it is heated or cooled, which would result in cracking thereof. The electron welding equipment comprises gun 10 and workpiece 14 enclosed in vacuum chamber 12. The high voltage (160 Kv) switch 18 for the gun is immersed in a tank of oil 16. The photo-electric cell for controlling switch 18 is located adjacent thereto and receives light pulses via optical fibre guide 42 from a gallium arsenide lamp 40 which is supplied by the pulse generator 38. The pulse generator control circuit, Fig. 3, includes integrating amplifier 26 whose output voltage, on starting of a welding operation, by a START order to control circuit 20, gradually increases in amplitude, causing a control on line 36 to pulse generator 38, which produces pulses of gradually increasing duration. This results in heating of the workpiece. When the voltage, which is also fed to amplifier 32, reaches the value set by resistor 34, the logic circuit 20 switches over, opening 24, and closing 43. The output of amplifier 26 now decreases until the voltage drops below the value set by 34, to cause switching of logic circuit 20 once more. The total effect is for the voltage to hunt around the level set by 34, resulting in a constant duration of pulses from 38. This continues until the welding cycle is virtually complete. The logic circuit 20 is then signalled from 14 to switch over and allow amplifier 39 to be effective as the voltage from 26 decreases until it reaches the value set by 48 and switch down of the system occurs.